C Plus Plus GitHub Repositories (2026) · Open Source Tools

A cross-platform virtual tabletop for multiplayer card games

An open source C++ game engine.

Open-source software for volunteer computing and grid computing.

A toolkit for making real world machine learning and data analysis applications in C++

Simple and Fast Multimedia Library

Console-based GLSL Sandbox for 2D/3D shaders

ArrayFire: a general purpose GPU library.

Lightweight C++ command line option parser

DeSmuME is a Nintendo DS emulator

Simple Binary Encoding (SBE) - High Performance Message Codec

Explorer++ is a lightweight and fast file manager for Windows

Feed reader (podcast player, basic XMPP client and also Gemini protocol client) which supports RSS/ATOM/JSON and many web-based feed services.

Nameof operator for modern C++, simply obtain the name of a variable, type, function, macro, and enum

This is the Official source code repository of Synfig Studio animation software

C++ image processing and machine learning library with using of SIMD: SSE, AVX, AVX-512, AMX for x86/x64, NEON, SVE for ARM, HVX for Hexagon

A Gtk/Qt front-end to tesseract-ocr.

Otter Browser aims to recreate the best aspects of the classic Opera (12.x) UI using Qt5

Powerful, fast and robust engine for converting 3D models into g-code instructions for 3D printers. It is part of the larger open source project Cura.

The Polygon Mesh Processing Library

GemRB is a portable open-source implementation of Bioware’s Infinity Engine.